251680379 has 2 divisors, whose sum is σ = 251680380. Its totient is φ = 251680378.

The previous prime is 251680343. The next prime is 251680381. The reversal of 251680379 is 973086152.

251680379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251680379 is a prime.

Together with 251680381, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (251680339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125840189 + 125840190.

It is an arithmetic number, because the mean of its divisors is an integer number (125840190).

Almost surely, 2^251680379 is an apocalyptic number.

251680379 is a deficient number, since it is larger than the sum of its proper divisors (1).

251680379 is an equidigital number, since it uses as much as digits as its factorization.

251680379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 251680379 is about 15864.4375570015. The cubic root of 251680379 is about 631.3688043031.

The spelling of 251680379 in words is "two hundred fifty-one million, six hundred eighty thousand, three hundred seventy-nine".